<!DOCTYPE html>
<html lang="en" manifest="tracker.manifest">
<head>
<title>离线跟踪</title>
<script src="log.js"></script>
<script src="offline.js"></script>
<script src="tracker.js"></script> 
<link rel="stylesheet" href="html5.css">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
</head>
<body>
<section>
    <article>
        <button id="installButton">检查更新信息</button>
        <h3>信息提示</h3>
        <div id="info"> </div>
    </article>
</section>
</body>
</html> 
